package com.atguigu.springcloud0419.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {
    /**
     * 正常访问，一切OK
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id)
    {
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_OK,id: "+id+"\t"+"O(∩_∩)O";
    }

    /**
     * 超时访问，演示降级
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value="3000")
    })
    public String paymentInfo_TimeOut(Integer id)
    {
        int age=10/0;
        int second=1;
        try { TimeUnit.SECONDS.sleep(second); } catch (InterruptedException e) { e.printStackTrace(); }
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_TimeOut,id: "+id+"\t"+"O(∩_∩)O，耗费秒"+second;
    }
    public String paymentInfo_TimeOutHandler(Integer id){
        return "/(ㄒoㄒ)/调用支付接口超时或异常：\t"+ "\t当前线程池名字" + Thread.currentThread().getName();
    }
    //=========服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),//true:断路器是关闭的，使用服务熔断功能
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "20"),//请求次数 20
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "5000"),//时间窗口器，五秒
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "50"),//错误的百分率50%
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        System.out.println(".....come in paymentCircuitBreaker" + id);
    if (id<0){
        throw  new RuntimeException("****id不能为负数");
    }
    String serialNumber= IdUtil.simpleUUID();
        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;

    }
}
